Morphology of the DIN 100Cr6 Case Hardened Steel after Plasma Nitrocarburizing Process

Autor(es)

Fontes, Marcos Alves ^[1] ; Baggio Scheid, Vladimir Henrique ^[2] ; Machado, David de Souza ^[3] ; Casteletti, Luiz Carlos ^[4] ; de Paula Nascente, Pedro Augusto ^[5]

Afiliação do(s) autor(es)

^[1] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Sertaozinho, SP - Brazil

^[2] Inst Estudos Avancados, Dept Ciencia & Tecnol Aeroespacial, Sao Jose Dos Campos, SP - Brazil

^[3] Tecumseh Prod Co, Tecumseh Brasil, Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Dept Engn Mat, Sao Carlos, SP - Brazil

^[5] Univ Fed Sao Carlos, Dept Engn Mat, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 22, n. 3 2019.
• Citações Web of Science: 0

Resumo

Nitrocarburizing is considered one of the most important thermochemical treatments for surface modification of metallic materials and involves the simultaneous diffusion of nitrogen and carbon onto the surface. Understanding and controlling the formation of the nitrocarburized layer have considerable industrial interest due to the improvements regarding wear, fatigue, and corrosion resistances. DIN 100Cr6 steel samples were treated by plasma nitrocarburizing for two hours, with two treatment temperatures (550 and 600°C) and four methane concentrations in the gas mixture composition (0, 1.0, 1.5, and 2.0%). SEM and XRD analyses, and wear resistance tests were used to characterize the samples. Results showed that the treatment temperature and atmosphere composition had considerable influence on the compound layer morphology. For nitrided samples the compound layer consists of γ'-Fe4N phase, and the presence of carbon in the gas mixture helps stabilize the ɛ-Fe2-3N phase. Higher CH4 concentration in the treatment atmosphere improve the sample superficial wear resistance. (AU)

• Processo FAPESP: 17/25983-8 - Revestimentos de Titânio, Nióbio e suas Ligas sobre Aço Inoxidável AISI 316L e Titânio
• Beneficiário: Pedro Augusto de Paula Nascente
• Modalidade de apoio: Auxílio à Pesquisa - Regular